Tuberous Polypore
Polyporus tuberaster · Family Polyporaceae · Updated October 2026
36US records
13states
Junbusiest month
36 US records since 1814 (7 in the last 10 years)
Last seen Dec 24, 2024 (about 22 months ago) near Citrus Heights, Sacramento County, CA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from New York, California and Pennsylvania, and the busiest months are Jun, Jul and Feb. (Data as of October 26, 2026; records can lag by weeks.)
⚠ Never eat a wild mushroom based on this site. We show where fungi have been recorded, nothing more. We never say any mushroom is edible or safe, and you shouldn't decide that from any website, app or photo. Many deadly mushrooms look like harmless ones. If someone may have eaten a wild mushroom, call Poison Control at 1-800-222-1222 right away.
Lookalike warning. Many mushrooms, including deadly ones, closely resemble each other, and the only reliable identification comes from an expert looking at the actual specimen (often with spore prints or microscopy). Never use a name, photo or record count on this page to decide what something is.
When it's recorded
Records by month, all years. Busiest: Jun, Jul, Feb.
Where it's recorded
Top counties
- Chester County, PA (6)
- Monterey County, CA (3) · latest Jul 3, 2021
- Erie County, NY (3)
- Mackinac County, MI (2) · latest Jun 9, 2020
- Madison County, NY (2) · latest 1889-07
- Windham County, VT (2)
- Tompkins County, NY (2) · latest Mar 7, 1905
- Hennepin County, MN (1) · latest Jun 15, 2013
- Portage County, WI (1) · latest Jun 12, 1960
- Sevier County, TN (1) · latest Jun 22, 2011
More on this species from GBIF.
Bring along
🍄
Regional mushroom field guideSee on Amazon🍄
Folding mushroom knife with brushSee on Amazon🍄
Wicker foraging basketSee on Amazon🍄
10x hand lens / loupeSee on Amazon🍄
Spore print paperSee on AmazonAs an Amazon Associate we earn from qualifying purchases.